Two worlds, an ancient book, the moon is full for only two hours each month.
Eighteen-year-old Ren Jiu wants revenge, but he lives in a modern era where martial arts has declined; fifteen-year-old Wang Tian wants to restore his country, but is trapped in the strife and pursuit of the chaotic world of high martial arts. They met in a stone room filled with gray mist. They didn't make a contract or talk about friendship. They just each held the piece of the puzzle that the other was missing.
When the hourglass runs out, everyone returns to their places. See you again in thirty days.
Walking on the long night, we are each other's light.
